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• How to implement table-per-concrete-type using entity framework

  - by SDReyes

  Hello Guys! I'm mapping a set of tables that share a common set of fields: So as you can see I'm using a table-per-concrete-type strategy to map the inheritance. But... I have not could to relate them to an abstract type containing these common properties. It's possible to do it using EF? BONUS: The only non documented Entity Data Model Mapping Scenario is Table-per-concrete-type inheritance http://msdn.microsoft.com/en-us/library/cc716779.aspx : P

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• Database design -- does it respect 3rd NF?

  - by Flavius

  Hi I have the following relations (tables) in a relational model Person person_id, first_name, last_name, address Student person_id, matr_nr Teacher person_id, salary Lecture lecture_id, lect_name, lect_description Attendees lecture_id, person_id, date I'm wondering about the functional dependencies of Student and Teacher. Do these tables respect the 3rd normal form? Which should be the primary keys of these tables?

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• How to limit the number of post values on UpdatePanel ?

  - by Aristos

  I have notice that the UpdatePanel post every field included on the form on every trigger. But in most of my cases I use 2-3 UpdatePanels at the same page, and each one is independent. When I click for update the one panel, then my page receive all the input data of the page (ok this is logical) but I won to read only this UpdatePanels data and act according, and not the other panels data. So I see that a lot of traffic is happened this way. So is there a way to say to one UpdatePanel - send only my input data, and not everything found on the page. ? Thank you in advanced.

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• Get file size of BufferedImage before writing the data

  - by David

  I'm working on a Java program that needs to send an image (preferably in PNG format, though I could perhaps use another format if necessary) over the network. The logical way to do this is, of course, to first send the length of the PNG image data, then the data itself. Problem: I don't see any method in ImageIO or anywhere else that will give me the length of the image data. Does this exist somewhere in the Java 1.6 standard library? I know I could just write it to a ByteArrayOutputStream and get the length of the resulting array, but before resorting that I wanted to make sure I'm not missing something built in. And besides, that makes an extra copy of the image data, which I'd rather not do if it's not necessary.

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• Diff applications going crazy if the functions in the file were reordered

  - by VitalyB

  I've been busy refactoring a file in our project and as part of my changes I reordered the function to a more logical way. However, now when I'm trying to review my changes I get a mess: The diff applications has no idea that the functions were merely reordered and marks 80% of the file content as changed. I've tried to see the diff with both "Beyond Compare" and "WinMerge" to the same result. Is there some setting that might help me here? As tagged, I am using C# on Windows.

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• Redirect to prevent dup submission...but then you loose existing data

  - by coffeeaddict

  Here's the scenario User is on your checkout.aspx page Somewhere in the process, when clicking the pay button, you redirect the user to an intermediate page (before the confirmation page) to do some other logic. That intermediate page performs whatever logic based on a querystring flag you sent with the redirect from the checkout page This intermediate page also serves as an error page. So if any logic in the intermediatePage.aspx.cs fails I'm setting a message to be displayed on this page to the user If I refresh, that querystring value is still in the url..hence when it hits my Page_Load again, then the server-side logic is called & run again and I don't want this to happen The avoid this behavior/problem, the logical next step is to do a redirect back to the same page if they refresh (not sure how you'd catch that) to get rid of that querystring But when you redirect back to the same page your error message is gone, lost in the redirect therefore you end up showing them the same page but all values for the error message are now gone I do not want to solve this with Javascript either. I am not sure the best way to handle this.

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• working with multiple forms in same action class in Struts2

  - by jpanewbie

  How do we populate\retrieve information from\into multiple forms in same action class in Struts2 ? With ModelDriven approach, action is tied to one form. With ScopedModelDriven interceptor jsp becomes dirty as one has to write model.property to access form properties. Is there a better way of doing it?

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• Hint to MVC view generator for primary key on POCOs

  - by myotherme

  When generating a strongly-typed Index view for my model I always get the following: <%= Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) %> I am using a POCO class for use with our ORM. As I understand it when using LINQ to SQL the view code will know which field is the primary key. Is there a way that I can an attribute to the property (or class) that will let the View Generator know that the ID property if the primary key?

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• can we write this in C++ switch ?

  - by jellly

  #include <iostream> using namespace std; int main(){ char i; cin >>i; switch (i){ case ('e'||'i'||'o'||'u'||'a'): cout<<"Vowel"; break; case ('+'||'-'||'/'||'*'||'%'): cout<<"Op"; break; } return 0; } if not than how can we use comparison or logical operators in switch ? & why cant we declare and initialize variable in single case without using scope ?

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• How to represent datetime of different time zomes in C#

  - by Mohoch

  I have a .NET WebService (written in C#), that is supposed to serve people around the world. With each request I get the user's datetime in his own time zone with the format : yyyy/MM/dd HH:mm ZZZZ. I have to convert the string to something representing the original date and time and specifying the time zone in GMT. I have to make some logical calculations and keep it in the database. The regular DateTime doe's not support this. it does not have a property specifying the time zone. When I try to convert my string into DateTime - it simply converts it to my local time. I do not want to keep my time in UTC, because I have some logic that has to run per user by his own time. Does anyone know a C# class that handles this?

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• How do I make non-framework code to framework code? (PHP)

  - by ggfan

  I just started using CakePHP and it's very different from just normal procedural or basic OOP PHP. I am still learning PHP and still read "beginning PHP/mysql" books that teaches you basic PHP. Also lots of sites online provide code that isn't for a framework. Is the only way to make non-framework code to say a framework, say cakePHP, by learning cakePHP thoroughly than rewriting the code yourself to fit the MVC model?

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• URL redirection if wrong url

  - by xRobot

  I have this method in my book model: def get_absolute_url(self): return "/book/%s/%s/%i/%i/" % ( self.book_title, self.book_editor, self.book_pages, self.id) So the urls of each book are like this: example.com/book/the-bible/gesu-crist/938/12/ I want that if there is an error in the url, then I get redirected to the real url by using book.id in the end of the url. For example if I go to: example.com/book/A-bible/gesu-crist/938/12/ the I will get redirected to: example.com/book/the-bible/gesu-crist/938/12/ How can I do that ?

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• What does the symbol ::: mean in R

  - by Milktrader

  I came across this in the following context from B. Pfaff's "Analysis of Integrated and Cointegrated Time Series in R" ## Impulse response analysis of SVAR A-type model 1 args (vars ::: irf.svarest) 2 irf.svara <- irf (svar.A, impulse = ”y1 ” , 3 response = ”y2 ” , boot = FALSE) 4 args (vars ::: plot.varirf) 5 plot (irf.svara)

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• Friendly PHP framework for a newbie?

  - by dineshbabu

  Hello people, I am given a task to convert a crappy(non-secure) hardcoded website into a good one using any good framework. I have a good idea of PHP. So can you help me in choosing a framework? Also, do i need to learn about Model View Controller to use frameworks?

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• AngularJS - Processing $http response in service

  - by bsreekanth

  I recently posted a detailed description of the issue I am facing here at SO. As I couldn't send an actual $http request, I used timeout to simulate asynchronous behavior. Data binding from my model to view is working correct, with the help of @Gloppy Now, when I use $http instead of $timeout (tested locally), I could see the asynchronous request was successful and data is filled with json response in my service. But, my view is not updating. updated Plunkr here

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• Logging in MVC (Zend Framework)

  - by superdario

  Is there a best-practice when it comes to where to put the logging functionality in an MVC application, for example a Zend Framework application (Zend_Log)? Should I put the logging in the controller or in the model? Or in both? If in both, should they have the same logger or a separate one?

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• ASP.NET MVC: Optimally render element attribute

  - by majkinetor

  I know there is some syntax with ? to optionally render attribute. But I can't find it now that I need it ... Something like: < input checked=<%? model.IsActivated % > ... Thanks.

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• how to get the filed mapName 's value on a form.. uding django

  - by zjm1126

  my form is class MapForm(forms.ModelForm): class Meta: model = Map fields = ('mapName', 'kmlStr') and the view is : map_form = MapForm(request.POST or None) if map_form.is_valid(): map = map_form.save(commit=False) map.mapName=map_form.mapName#is thie code right ? how to get the mapName 's value , us 'map_form.mapName' ? thanks

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• displaying a listbox using Html.List, and I have a List<User> collection

  - by Blankman

  Is a List enumerable? Html.List("mylistbox", Model.UserList); doesnt' seem to be working, where UserList is a List collection.

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• javancss includes problem

  - by senzacionale

  <javancss srcdir="C:\Projekti\KIS\Model\src" generateReport="true" includes="**/*.java" outputfile="docs/javancss_metrics.xml" format="xml" /> if i use includes="*/.java" then no metrics are calculated. If i delete includes then works. Any idea why?

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• Java Swing - Adding a row # column to a JTable

  - by llm

  I have data from a database loaded into a JTable through a custom table model. I want to have a column (should be the first column) which simply shows the display row number (i.e. it is not tied to any data (or sorting) but is simply the row number on the screen starting at 1). These "column headers" should be grayed out like the row headers. Any idea how to do this? Thanks

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• How the Google Chrome Linux version handles automatic version updation

  - by AJ

  Hello, Can some one tell me how the Chrome's Linux beta version carry out automatic version updation using debian package manager. I need to implement something similar to my application on linux and information provided here would be of lot of help. I am currently checking out the postinst script present in the debian control package and I can see Chrome uses PGP publish/subscribe model for getting automated version updates in Linux. I just clear understanding of how that works. Any help would be greatly appreciated. Thanks

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• Save from viewController?

  - by fuzzygoat

  I have a very small bit of data that I would like to archive from my apps view. My question is, its far easier to save this data from the viewController, but should I really be pushing it back into my model and saving it there? BTW: I also need to do a quick load of this data when the app starts up.

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• Fastest way to copy a set (100+) of related SQLAlchemy objects and change attribute on each one

  - by rebus

  I am developing an app that keeps track of items going in and out of factory. For example, lets say you have 3 kinds of plastic coming in, they are mixed in various ratios and then sent out as a new product. So to keep track of this I've created following database structure: This is very simplified overview of my SQLAlchemy models: IN <- RATIO <- OUT <- REPORT ITEMS -> REPORT IN are products coming in, RATIO is various information on measurements, and OUT is a final product. REPORT is basically a header model which has a lot of REPORT ITEMS attached to it, which in turn relate it to OUT products. This would all work perfectly, but IN and RATION values can change. These changes ultimately change the OUT product which would mean the REPORT values would change. So in order to change an attribute on IN object for example I should copy that object with that attribute changed. I would think this is basically a question about database normalization, because i didn't want to duplicate all the IN, RATIO and OUT information by writing it in REPORT ITEMS table for example, but I've came across this problem (well not really a problem but rather a feature I'd like for a user to have). When the attribute on IN object is changed I want related objects (RATIO and OUT) automatically copied and related to a new IN object. So I was thinking something like: Take an existing instance of model IN that needs to change (call it old_in) Create a new one out of it with some attributes changed (call it new_in) Collect all the RATIO objects that are related to old_in Copy each RATIO and relate them to a new_in Collect all the OUT objects that are related to old RATIO Copy each OUT and relate them to a new RATIO Few questions pop to mind when i look at this problem: Should i just duplicate the data, does all this copying even make sense? If it does, should i rather do it in plain SQL? If no what would be the best approach to do it with Python and SQLAlchemy? Any general answer would suffice really, at least a pointer in right direction. I really want to free then end user for hassle of having create new ratios and out products.

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• doctrine cant find my BaseModels in the models/generated folder

  - by ajsie

  when i use a Doctrine Model Doctrine cant find the BaseModel in the models/generated folder. what should i put in the Doctrine bootstrap file to tell it they are in the models/generated folder? thanks!

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